40427918 has 4 divisors (see below), whose sum is σ = 60641880. Its totient is φ = 20213958.

The previous prime is 40427879. The next prime is 40427957. The reversal of 40427918 is 81972404.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (40427879) and next prime (40427957).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106978 + ... + 10106981.

It is an arithmetic number, because the mean of its divisors is an integer number (15160470).

Almost surely, 2^40427918 is an apocalyptic number.

40427918 is a deficient number, since it is larger than the sum of its proper divisors (20213962).

40427918 is a wasteful number, since it uses less digits than its factorization.

40427918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20213961.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 40427918 is about 6358.2952117686. The cubic root of 40427918 is about 343.2104152526.

The spelling of 40427918 in words is "forty million, four hundred twenty-seven thousand, nine hundred eighteen".